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Rules Sections 9.1 - What coordinate system and basis of bearings (horizontal controls) and vertical datum (vertical controls) were referenced in collecting this survey data?
Bearings are based on the Ohio State Plane Coordinate System, South Zone, as derived from the Ohio Department of Transportation's virtual reference stationing (vrs). (NAD '83 - 2011). elevations are based on NAVD '88, as derived from the Ohio Department of Transportation's virtual reference stationing
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Rules Sections 9.1 - How was the survey data for utilities collected? Were utilities excavated, located by paint markings, or found by some other method?
The utility locations were located by a combination of above ground evidence of the utility and paint markings.
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Rules Sections 9.1 - What does the description code "MON BOX" represent?
Monument Box.
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Rules Sections 9.1 - Assuming that the scope of the survey was discussed prior to beginning the field work, for what purpose was this survey requested, and why is the project's client interested in this property?
This survey was requested by the client for potential development opportunities.
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Rules Sections 9.1 - Why are there multiple areas void of ground shots within the extents of the survey?
The survey was completed using LiDAR. The camera was not able to "see" through the tree cover to get ground shots.
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Rules Sections 9.1 - What types of survey instruments were used to collect data for this project?
LiDAR
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Rules Sections 9.1 - For the soil borings: what do codes "AW" and "A+W" mean? Whether or not boring logs are to be provided, is the location of these soil borings relevant to the client's survey request?
AW and A+W are the soil boring designations in the field and are used by the geotechnical engineer.
If these points have elevation data, they will be relevant to the surface creation, otherwise they can be ignored. Boring logs will not be provided for this project.
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Rules Sections 9.1 - "SO PROP CORNER" points are marked on monumentation for properties other than what is described in the provided legal description. Please clarify the expectation of how teams should be using these designated property corners.
All existing monumentation should be shown on the project. These points may be used as part of your surface if they have elevations associated with them. The only property lines that should be shown on the project are those that are described in the provided legal description.
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Rules Sections 9.1 - Are RCP, CPP, PVC, and CMP invert shots supposed to be connected with a line? If so, are pipes of different materials/diameters connected to each other? Please clarify the nature of the "INV" survey points, and how they are expected to be displayed within the topographic map.
Typically only one pipe material is used in any given run of pipe. Pipes of different sizes will only connect at a manhole or catch basin. Existing utilities should be shown on a topographic map with the inverts labeled.
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Christopher Chiu M.ASCE
Civil Engineer (Hydraulics)
Fort Worth TX
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